Non-aerosol type dispenser

Abstract

A portable, hand operated dispenser for spraying fluid composition under pressure wherein a fluid composition to be sprayed is contained in a fluid impervious flexible bag housed within the container and the content material is forced from the bag by continuous pressure operating on the outside of the bag from an available source.

I claim: 
     
       1. A portable, hand operated dispenser for spraying fluid composition under pressure comprising a container having an open mouth at the top and an inlet in the body portion below the top, means connecting the inlet with a source of high pressure fluid, a flexible, fluid impervious bag adapted to be filled with the fluid material to be dispensed and to be received within the container with an open upper end portion of the bag draped over and about the wall defining the open upper end of the container, a spray head including a cap portion, a spray portion and a handle portion, said cap portion having means for removably securing the spray head onto the open upper end of the container in sealing relation therewith and with the portion of the bag in between, said spray portion including a tubular section having a nozzle opening at one end and an inlet in communication with the interior of the container when the spray head is in the assembled relation on the container, a needle valve mounted in the tubular section for reciprocal movement in the direction towards and away from the nozzle to plug the nozzle opening when in closed position and to free the opening when in open position, and means for actuating the needle valve between open and closed positions, said handle portion being located immediately rearwardly of the nozzle and cap portions in which the cap portion is formed with an open ended downwardly extending cylindrical skirt and in which the means removably securing the cap portion onto the container comprises screw threads in the skirt and screw threads in the outer wall of the container adjacent the upper end to enable the cap portion to be screwed onto and off of the container, and in which the lowermost screw thread in the cap portion and container are formed with surface roughness or rack teeth in adjacent surfaces to militate against relative turning movement when pressure conditions exist within the container sufficient to urge the cap portion to lift off of the container. 
     
     
       2. A portable hand operated dispenser for spraying fluid composition under pressure comprising a container having an open mouth at the top and an inlet in the body portion below the top, means connecting the inlet with a source of high pressure fluid, a flexible, fluid impervious bag adapted to be filled with the fluid material to be dispensed and to be received within the container with an open upper end portion of the bag draped over and about the wall defining the open upper end of the container, a spray head including a cap portion, a spray portion and a handle portion, said cap portion having means for removably securing the spray head onto the open upper end of the container in sealing relation therewith and with the portion of the bag in between, said spray portion including a tubular section having a nozzle opening at one end and an inlet in communication with the interior of the container when the spray head is in the assembled relation on the container, a needle valve mounted in the tubular section for reciprocal movement in the direction towards and away from the nozzle to plug the nozzle opening when in closed position and to free the opening when in open position, and means for actuating the needle valve between open and closed positions, said handle portion being located immediately rearwardly of the nozzle and cap portions in which the cap portion is formed with an open ended downwardly extending cylindrical skirt and in which the means removably securing the cap portion onto the container comprises projections extending inwardly in circumferentially spaced apart relation from the skirt and corresponding circumferentially spaced apart receiving grooves in the outer wall of the container dimensioned to receive the projections therein, each of said grooves comprising an entrant portion which extends vertically downwardly from the upper edge of the container and a horizontally disposed downwardly inclined cam portion which operates to draw down the cap into sealing relation with the container as the projections are displaced therethrough, which includes means for militating against relative movement between the cap portion and container while pressure conditions exist within the container comprising a continuous groove extending upwardly from the opposite end of each of the horizontally disposed downwardly inclined grooves in the container wall to enable entry of the projections into the vertically disposed grooves when pressure conditions exist to urge the cap in the upward direction off of the container.